@Override
public void handleRequest(final RestRequest request, final RestChannel channel) {
ClusterStateRequest clusterStateRequest = new ClusterStateRequest();
clusterStateRequest.listenerThreaded(false);
clusterStateRequest.masterNodeTimeout(TimeValue.timeValueMillis(0));
clusterStateRequest.local(true);
clusterStateRequest.filterAll().filterBlocks(false);
client
.admin()
.cluster()
.state(
clusterStateRequest,
new ActionListener<ClusterStateResponse>() {
@Override
public void onResponse(ClusterStateResponse response) {
RestStatus status = RestStatus.OK;
if (response.getState().blocks().hasGlobalBlock(RestStatus.SERVICE_UNAVAILABLE)) {
status = RestStatus.SERVICE_UNAVAILABLE;
}
if (request.method() == RestRequest.Method.HEAD) {
channel.sendResponse(new StringRestResponse(status));
return;
}
try {
XContentBuilder builder =
RestXContentBuilder.restContentBuilder(request).prettyPrint();
builder.startObject();
builder.field("ok", true);
builder.field("status", status.getStatus());
if (settings.get("name") != null) {
builder.field("name", settings.get("name"));
}
builder
.startObject("version")
.field("number", version.number())
.field("build_hash", Build.CURRENT.hash())
.field("build_timestamp", Build.CURRENT.timestamp())
.field("build_snapshot", version.snapshot)
// We use the lucene version from lucene constants since
// this includes bugfix release version as well and is already in
// the right format. We can also be sure that the format is maitained
// since this is also recorded in lucene segments and has BW compat
.field("lucene_version", Constants.LUCENE_MAIN_VERSION)
.endObject();
builder.field("tagline", "You Know, for Search");
builder.endObject();
channel.sendResponse(new XContentRestResponse(request, status, builder));
} catch (Throwable e) {
onFailure(e);
}
}
@Override
public void onFailure(Throwable e) {
try {
if (request.method() == HEAD) {
channel.sendResponse(new StringRestResponse(ExceptionsHelper.status(e)));
} else {
channel.sendResponse(new XContentThrowableRestResponse(request, e));
}
} catch (Exception e1) {
logger.warn("Failed to send response", e);
}
}
});
}
